initial

code/__DEFINES/mode.dm

@@ -74,6 +74,7 @@
 #define MODE_DISPOSABLE_MOBS (1<<10) // Toggles if mobs fit in disposals or not. Off by default.
 #define MODE_BYPASS_JOE (1<<11) // Toggles if ghosts can bypass Working Joe spawn limitations, does NOT bypass WL requirement. Off by default.
 #define MODE_NO_JOIN_AS_XENO (1<<12) // Toggles if players can join as xeno
+#define MODE_BYPASS_VEHICLE_BLOCKERS (1<<13) /// Toggles if vehicles can bypass mapped vehicle blockers. Off by default.
 
 #define ROUNDSTATUS_FOG_DOWN 1
 #define ROUNDSTATUS_PODDOORS_OPEN 2

code/game/objects/structures/blocker.dm

@@ -107,7 +107,7 @@
 
 
 /obj/structure/blocker/forcefield/vehicles/handle_vehicle_bump(obj/vehicle/multitile/multitile_vehicle)
-	if(multitile_vehicle.vehicle_flags & VEHICLE_BYPASS_BLOCKERS)
+	if(MODE_HAS_TOGGLEABLE_FLAG(MODE_BYPASS_VEHICLE_BLOCKERS) || multitile_vehicle.vehicle_flags & VEHICLE_BYPASS_BLOCKERS)
 		return TRUE
 	return FALSE
 
@@ -116,7 +116,7 @@
 
 
 /obj/structure/blocker/forcefield/multitile_vehicles/handle_vehicle_bump(obj/vehicle/multitile/multitile_vehicle)
-	if(multitile_vehicle.vehicle_flags & VEHICLE_BYPASS_BLOCKERS)
+	if(MODE_HAS_TOGGLEABLE_FLAG(MODE_BYPASS_VEHICLE_BLOCKERS) || multitile_vehicle.vehicle_flags & VEHICLE_BYPASS_BLOCKERS)
 		return TRUE
 	return FALSE
 

code/modules/admin/admin_verbs.dm

@@ -330,6 +330,7 @@ var/list/roundstart_mod_verbs = list(
 		add_verb(src, /client/proc/toggle_game_master)
 		add_verb(src, /client/proc/toggle_join_xeno)
 		add_verb(src, /client/proc/game_master_rename_platoon)
+		add_verb(src, /client/proc/toggle_vehicle_blockers)
 	if(CLIENT_HAS_RIGHTS(src, R_SERVER))
 		add_verb(src, admin_verbs_server)
 	if(CLIENT_HAS_RIGHTS(src, R_DEBUG))

code/modules/admin/game_master/extra_buttons/toggle_vehicle_blockers.dm

@@ -0,0 +1,14 @@
+/// For PvE CM a convenient button to enable/disable the invisible vehicle blockers.
+/client/proc/toggle_vehicle_blockers()
+	set name = "Toggle Vehicle Blockers"
+	set category = "Game Master.Extras"
+
+	if(!admin_holder || !check_rights(R_MOD, FALSE))
+		return
+
+	if(!SSticker.mode)
+		to_chat(usr, SPAN_WARNING("A mode hasn't been selected yet!"))
+		return
+
+	SSticker.mode.toggleable_flags ^= MODE_BYPASS_VEHICLE_BLOCKERS
+	message_admins("[src] has [MODE_HAS_TOGGLEABLE_FLAG(MODE_BYPASS_VEHICLE_BLOCKERS) ? "allowed vehicles to bypass" : "prevented vehicles from bypassing"] vehicle blockers.")

colonialmarines.dme

@@ -1382,6 +1382,7 @@
 #include "code\modules\admin\game_master\game_master_submenu.dm"
 #include "code\modules\admin\game_master\extra_buttons\rename_platoon.dm"
 #include "code\modules\admin\game_master\extra_buttons\toggle_join_xeno.dm"
+#include "code\modules\admin\game_master\extra_buttons\toggle_vehicle_blockers.dm"
 #include "code\modules\admin\game_master\game_master_submenu\ambush.dm"
 #include "code\modules\admin\game_master\game_master_submenu\tunnels.dm"
 #include "code\modules\admin\game_master\game_master_submenu\vents.dm"